Rochester International in May 2026

85.7%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In May 2026, reporting carriers scheduled 168 domestic departures from Rochester International (RST). 85.7% left less than 15 minutes late and 82.7% reached their destination on time; 3.0% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so RST departures were 8.6 points above the national departure figure.

A year earlier, in May 2025, the airport had 192 departures with 81.8% leaving on time: a change of +3.9 points, with flights down 12%.

Flights arriving at RST that month were on time 85.2% of the time (169 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 54%, extreme weather 21% and late-arriving aircraft 16%.

On time 82.7%
Arrived 15+ minutes late 14.3%
Cancelled 3.0%
Diverted 0.0%

Every scheduled departure from RST in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	RST, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	85.7%	81.8%	70.3%	77.1%
Arrived on time	82.7%	77.6%	67.6%	77.6%
Cancelled	3.0%	0.5%	4.0%	0.9%
Average departure delay (late minutes only)	14.2 min	13.3 min	27.9 min	16.0 min
Scheduled departures a day	6	6	4	20,391
Scheduled departures	168	192	1,365	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	96	57%	77.1%	14.2 min	2.1%
MQ Envoy Air	72	43%	90.3%	-13.1 min	4.2%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
RST–ORD	Rochester to Chicago	93	81.7%	-1.7 min	4.3%
RST–MSP	Rochester to Minneapolis	75	84.0%	7.8 min	1.3%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	54.0%	33.0%	1,210
Late-arriving aircraft	16.0%	40.4%	358
National Aviation System	8.7%	20.5%	194
Extreme weather	21.4%	6.0%	479
Security	0.0%	0.1%	0

2,241 delay minutes on 24 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left RST on time in May 2026?

85.7% of 168 scheduled domestic departures left less than 15 minutes late, and 82.7% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 81.8% of 192 departures left on time and 0.5% were cancelled, against 85.7% and 3.0% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for RST · methodology · corrections.